Stove or furnace grate.



J. A. TYNAN.

sTovE 0R PURNAGE GRATE.

APPLIOATION FILED 00T.7,1908.

91 7, 382 Patnted Apr. 6, 1909.

2 SHEETS-SHEET 1.

A TTORNE Y.

J. A. TYNAN'.

STOVE 0R FURNACB GRATE.

. vAPPLIoJrIoN FILED 00T. 7, 1908.

2 SHEETS-SHEET 2.

91 7,382. Patented Apr. 6, 1909.

WITNESSES: v INVENTOR.' .MM

A TTORNE Y.

'UNITED earner JOHN A. TYNAN, OF INDIANAPOLIS, INDIANA, ASSIGNOR OFONE-HALF TO BYRAM FOUN DRY COMPANY, OF INDIANAPOLIS, INDIANA, ACORPORATION OF INDIANA.

STOVE OR FUPJNACE GRATE.

Specification of 'Letters Patent. j

Patented April 6, 1909.

To all whom 'it may concer/a:

Be it known that I, JOI-IN A. Trnnn, a citizen of the United States,residing at Indianapolis, in the county of Marion and State of Indiana,have invented certain new and useful Improvements in Stove or Fun naceGratos; and I do declare the following to be a full, clear, and exactdescription of the invention, reference being` had to the companyingdrawings, and to the iigures of reference marked thereon, which form apart of this specification.

This invention relates to gratos for stoves or furnaces of various typesand has reference particularly to means for loosening ashes on thegratos beneath the beds of fire so that the ashes may fall through thegrates and without breaking up the beds of fire; the invention havingreference also to grates that are adapted especially for stoves andprovided with the means for dislodging the ashes.

The object of the invention is to provide means whereby 'lires in stovesor furnaces may be kept free of ashes that ordinarily accumulate on thegrates and prevent free draft and consequently complete consumption ofthe fuel the object particularly being to provide apparatus of the abovementioned character that may be operated without the necessity ofbreaking up a bed of 'fire and causing unconsumed iuel to drop throughthe grates and become lost in the ashes, the aim being to remove theashes frequently or as often as may be desired to obtain the de siredheat from the lire; a still further object being to improve theconstruction of stove grates to the end that economy in the consumptionof fuel may be attained.

The invention consists in the application of rakes below stove orfurnace gratos, means for guiding the rakes longitudinally of thegrate-bars, and means for raising and lowering the rakes during theiroperation, the rakes being adapted to be raised so that the fingersthereof may be projected between the grate-bars to loosen the ashes uponthe grate-bars; the invention consisting further in a novel form of rakefor gra-tes and means for adjustably supporting and guiding the rake.The invention consists also in the novel parts, and combinations andarrangements of parts, comprised in the construction of grates, ashereinafter particularly described and defined in the accompanyingclaims.

Referring to the drawings Figure l is a vertical sectional view of anordinary coal burning stove having the improved grate and the novel rakeapplied thereto as illustration of the purposes of the invention; 2, afragi'nentary vertical sectional view approximately on the plane of theline A A in Fig. l; Fig. 3, a fragmentary horizontal sectional viewapproximately at the plane of the line B B in l showing the rake as whenraised for operation; Fig. e, a fraginentary top plan of the stove basewithout the `lire-pot and showing the grate in operative position aswhen dumping clinkers and the large accumulations of ashes; Fig, 5, afragmentary perspective view showing portions of the improved grate anda rake connected therewith; 6, a perspective view of the rake invertedand the operating rod thereof broken off; Fig. 7, a perspective view ofa part of the grate as constructed for stoves; and Fig. 8, an invertedplan of the improved stove grate and rake in connection with the stovebase partially broken away.

Similar reference characters in the various ligures of the drawingsindicate corresponding elements or features of construction referred toherein.

In the drawings the numeral l indicates the base of the stove to receivethe ashes from the fire, the base having a door 2 and a top 3 on whichis a nre-pot 4, there being a drum 5 on the top of the fire-pot andhaving a draft pipe connection 6 and also a door 7. It will be obvious,of course, that the stove may be variously constructed. The top 3 of thebase has a circular opening 8 therein and the under side of the top isprovided with grate supporting lugs 9, 9, 9, that extend inward towardthe middle of the stove beyond the inner side of the opening S. Thegrate comprises a ring 10 which is supported on the tops of the gratesupporting lugs, so as to slide thereon about the vertical axis ofthestove. The top of the ring has an enlarged portion Il extending upwardat one side thereof and a projection 1l arranged oppositely so that abearing l2 is provided between them on the top of the ring. Two otherprojections 13 and 13 are formed on the top of the opposite side of thering, and a bearing i4 is formed between these projections. A

- thereof below the bearing 14.

recess formed in the under side ofthe ring 10 in the enlarged portion11. The ring has a projection 16 formed on the under side The ring isguided when operated by the circular side of the opening 8 in the top 3of the base. Another part of the grate comprises a ring or frame 17having parallel grate-bars, as 18 and 13', formed integrally therevnthone grate bar extending through the middle of the space -within thering, and the under side of the middle grate-bar 18 has a projection 19formed thereon in which a guide-pin 20 is driven in a suitable holeformed in the projection and at a suitable distance from the grate-bar.The ring 17 has a pair of trunnions 21 and 21 formed on opposite poritions thereof that are supported rotativoly on the bearings 12 and 14 ofthe ring 10. The ring 17 is somew hat less in diameter' than the ring10, so that an air space is formed between the two rings. Any suitableprovi-- sion may be made for preventing longitudinal movements of thetrunnions so that the ring 17 will be maintained concentrioally to thering 10 when at rest.

rl'he rake for loosening the ashes under the lire comprises a framehaving a head portion 22 from which extends two parallel bars 23 and 23joined by a cross bar 24 from which extends two guide 'lingers 25 and 25having the inner side of the ends thereof beveled as at 26 to guide thengers at opposite sides of the projection 16, and the projectionpreferably has its contact sides beveled as indicated in Fig. 8. Thebars 23 and 2K are guided. against opposite sides of the projection 19which extends between the two bars, and the rake is stopped by contactof the head 22 with the projection 19 in one direction, and by contactof the cross bar 24 'with the proj ection 19 in the opposite direction.The bars 2 3 and 23 normally rest on the pin 2O in inclined positions v;ith the head 22 against the projection 19. rlfhe under sides of the bars23 and 23 have ribs 27 and 27 thereon that have inclined ends 23 and 28respectively adapted to engage the pin 20 when the head 22 is moved avay from the projection 19 and force the under sides of the ribs up ontothe top of the pin 2O to be guided thereon. rPhe frame has two curvedlateral arms 29 and 29 extending from the bars 23 and 23 near the head22 and two other curved lateral arms 30 and 30 extending also from thebars 23 and 23 at or near the cross bar 24, the curved arms being formedas segments of circles corresponding approximately to the curvature ofthe ring 17 or to a smaller circle concentric thereto. rlhe to of thearm 29 has a suitable number of ngers 31 thereon, similar iingers 31being formed on the arm 29, and sirnl'lar finge-rs 32 and 32 are for-medon the tops ofthe arms 30 and 30, all the lingers extending up betweenthe grate.

bars nearly to the plane of the tops of the bars when the frame is inits normal lowerinost position. The rake has an operating rod 33extending from the head 22 of the frame and the rod extends through anaperture 34 in the top 3 of the base, the aperture being of suitablelength to permit lateral movements oi the operating rod therein, the endportion oi the operating rod being provided vrith a stopper 35 to closethe aperture when the rake is in normal position at rest, and the end ofthe rod 33 is provided with a handle 36 adapted to be engaged by anysuitable implement for turning the operating rod rotatively to rock thegrate bars when the stopper 35 is withdrawn from the aperture 34` Thestopper normally prevents rotation of the rod.

lt should be understood that modiiications will obviously be made in theconstruction of various types of grates other than herein illustrated,and also modifications will be made in the rake and its guiding supportsand means for raising and lowering the rake so as to be adapted to beused with various types ot' grates, within the scope of the claimslappended hereto.

1n practical use the invention as herein illustrated will be operated bymeans of the operating rod 33. When the draft needs to be .improved onlyslightly the operating rod 33 may be drawn out slightly so as to openthe aperture 34 and then may be moved laterally so as to turn the ring1() and consequently move the other parts of the grate, which will cause'fine ashes to be dropped and especially those above the opening betweenthe rings 10 and 17 and permit the air to rise into the iire near theiire-pot wall or at the edge ol the rire, which enect is always desired.1f more draft is desired the operating rod may be further pulled out sothat the guide ribs 27 and 27 will be drawn up on the pin 2O and thusforce the rake Jlingers above the grate bars into the ashes, which maybe dislodged so as to drop into the ash pan or ash pit, by moving theoperating rod 33 longitudinally. 1n case that it be desired to brealr`up clinlers the rod 33 is to be drawn out until the lingers 25 and 25are drawn away from the projection 16, and then the ring 17 may berocked su'lriciently to break the bed oi clinliers, and when desired theclinkers may be dumped by rotary movement of the operating rod 33 so asto tilt the inner portion ofthe grate comprising the ring 17 and thegrate bars as illustrated in Fig. 4, and when so dumped the operatingrod 33 will be carried into the recess 15 inthe under side oi the ring10. W hen the lingers 25 and 25 engage the projection 16 as they donormally they assist the stopper 35 in preventing the accidental dumpingof the grate.V

Having thus described the invention, what is claimed. as new, is-

lll)

l. A stove or furnace including a base with a circular opening in thetop thereof, a ring supported in the circular opening, a grate partmounted to rock in the ring, a rake mounted movably under the gratepart, means connecting the rake with the grate part for enabling therake to control the grate part, and means with which the rake maycooperate to lock the grate part to prevent its rocking.

2. A stove or furnace grate including a supporting ring having two journal-bearings on opposite sides of the top thereof and having also arecess in the under side thereof near one of the j ournal-bearings, anda grate part having two truimions to rest or rotate on thejournal-bearings and having also an operating rod connected with theunder side thereof for tilting the grate art on the journal-bearings,the rod normal y extending under the journal-bearings and being carriedlaterally by the tilting grate part into the recess.

3. A stove or furnace including a plurality of grate-bars, one of thegrate-bars having a projection on the under side thereof that has abearing member thereon, a rake-frame normally resting on the bearingmember and having a rib on the under side thereof that has an inclinedend to be moved against the bearing member for raising the rake-frame,the rake-frame having also lateral arms, lingers on the tops of the armsin planes between the grate-bars, means for guiding the rake-framelongitudinally of the grate-bars, and an operating device connected tothe rake-frame for movement thereof to force the rib onto the bearingmember and raise the rake-frame and fingers.

4. A stove including a base, a ring supported movably by the base andhaving journal-bearings thereon and also a projection on the under sidethereof, a grate-part comprising a ring and integral grate-bars andprovided with trunnions that are mounted in the journal-bearings, one ofthe grate-bars having a projection on the under side thereof, abearing-pin attached to the projection of the grate-bar, a rake-framecomprising two bars normally resting on the bearing-pin and havingbevel-end ribs on the under sides thereof to be moved onto thebearing-pin,

the rake-frame having two lingers normally engaging the projection thatis on the under side of the movably-supported ring, fingers on therake-frame in planes between the grate-bars, and an operating rod rigidon the rake-frame.

5. A stove including a base having an aperture in the side thereof and acircular opening in the top thereof, a supporting ring supported in thecircular opening to move rotatively and having journal-bearings thereon,a grate-part comprising a ring and invtegral grate-bars and providedwith trunnions that are mounted on the journal-bearings, a rake-framemounted movably under the grate-part and having an operating rod thereonthat extends through the aperture for moving the rake-frame, the rodhaving a stopper thereon that normally closes the aperture, meansconnecting the rake-frame with the grate-part to tilt the grate-part orto move the supporting ring, fingers on the top of the rake-frame inplanes between the grate-bars, and means for raising or lowering therake-frame.

6. In a stove or furnace grate, the combination with supporting means,of a supporting ring having two journal-bearings on the top thereof andmounted on the supporting means to move rotatively in a horizontalplane, the ring having a recess in the under side thereof near one ofthe journal-bearings, a grate-part comprising a ring and integralgrate-bars and having two trunnions thereon that are mounted in thejournal-bearings, a rake-frame mounted movably on the under side of thegrate-part and having fingers thereon that extend upward in planesbetween the grate-bars, means for raising or lowering the rake-frame, anoperating rod rigid on the rake-frame for tilting or moving therake-frame, the recess in the supporting ring receiving the rod when thegrate-part is tilted, and means acting to tilt the grate-part when therake-frame is tilted.

In testimony whereof, I affix my signature in presence of two witnesses,on the 2nd day of October, 1908.

JOHN A. TYNAN. Witnesses: Y

E. T. SILvrUs, K. R. WTODDELL.

